参数资料
| 型号： | MIC4721YMMTR |
| 厂商： | Micrel Inc |
| 文件页数： | 14/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.5A 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP |
| 其它名称： | MIC4721YMM TR |
Micrel, Inc.
5V IN and 1.8V OUT at 1.5A load;
MIC4721
The graph above shows the effects on the gain and
phase of the system caused by feedback resistors and a
?
?
Phase Margin = 43.1 Degrees
GBW = 218KHz
feedforward capacitor. The maximum amount of phase
boost achievable with a feedforward capacitor is
graphed below.
The non-synchronous MIC4721 regulator only has the
ability to source current. This means that the regulator
must rely on the load to sink current. This causes a non-
linear response at light loads. The following plot shows
the effects of the pole created by the nonlinearity of the
output drive during light load (discontinuous) conditions.
By looking at the graph, phase margin can be affected to
a greater degree with higher output voltages. The next
bode plot shows the phase margin of a 1.8V output at
1.5A without a feedforward capacitor.
3.3V IN and 1.8V OUT I OUT = 50mA;
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?
Phase Margin = 90.5 Degrees
GBW = 64.4KHz
Feed Forward Capacitor
The feedback resistors are a gain reduction block in the
overall system response of the regulator. By placing a
capacitor from the output to the feedback pin, high
frequency signal can bypass the resistor divider, causing
a gain increase up to unity gain.
May 2007
14
M9999-052907-A
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相关代理商/技术参数 |
参数描述 |
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| MIC4722 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
| MIC4722_10 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
| MIC4722YML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC4722YML TR | 功能描述:直流/直流开关调节器 3mm X 3mm 2.7MHz 3A PWM Buck Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4722YML-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 1V 1 Output 3A 12-VFDFN Exposed Pad, 12-MLF? 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:2.7V 电压 - 输入（最大值）:5.5V 电压 - 输出（最小值/固定）:1V 电压 - 输出（最大值）:5.5V 电流 - 输出:3A 频率 - 开关:2.7MHz 同步整流器:无 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:12-VFDFN 裸焊盘，12-MLF? 供应商器件封装:12-MLF?（4x4） 标准包装:1 |
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